BLL/Category.cs

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using System;
using System.Collections.Generic;

using System.Data;


using MyShop.DALFactory;
using MyShop.IDAL;
using MyShop.Model;
using MyShop.Enumerations;
using MyShop.Common;

namespace MyShop.BLL
{
    public class Category
    {
        private ICategory dal = DataAccess.CreateCategory();
        private int _id;

        public Category()
        {

        }

        public Category(int id)
        {
            this._id = id;
        }

        #region ICategory member

        protected int Add(CategoryInfo model)
        {
            if (model == null)
                return 0;
            return dal.Add(model);
        }
        public int Delete(string filter)
        {
            if (string.IsNullOrEmpty(filter))
                return 0;
            return dal.Delete(filter);
        }

        public bool Exist(string filter)
        {
            filter = filter.Trim();
            if (string.IsNullOrEmpty(filter))
                return false;
            return dal.Exist(filter);
        }

        public DataSet GetDataSet()
        {
            return dal.GetDataSet();
        }
        public DataSet GetDataSet(string filter)
        {
            filter = filter.Trim();
            if (string.IsNullOrEmpty(filter))